Bound the impact of system instability on chrome instability.

components/browser_watcher/fetch_system_session_events_main_win.cc

Index: components/browser_watcher/fetch_system_session_events_main_win.cc
diff --git a/components/browser_watcher/fetch_system_session_events_main_win.cc b/components/browser_watcher/fetch_system_session_events_main_win.cc
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+++ b/components/browser_watcher/fetch_system_session_events_main_win.cc
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// A utility for testing locally the retrieval of system session events.
+
+#include <iostream>
+
+#include "base/logging.h"
+#include "base/strings/stringprintf.h"
+#include "base/time/time.h"
+#include "components/browser_watcher/system_session_analyzer_win.h"
+
+namespace {
+
+using browser_watcher::SystemSessionAnalyzer;
+
+class SystemSessionEventFetcher : public SystemSessionAnalyzer {
+ public:
+  explicit SystemSessionEventFetcher(uint32_t session_cnt)
+      : SystemSessionAnalyzer(session_cnt) {}
+  using SystemSessionAnalyzer::FetchEvents;
+};
+
+}  // namespace
+
+int main(int argc, char** argv) {
+  // Retrieve events for the last 5 sessions.
+  SystemSessionEventFetcher fetcher(5U);
+  std::vector<SystemSessionEventFetcher::EventInfo> events;
+  if (!fetcher.FetchEvents(&events)) {
+    std::cerr << "Failed to fetch events." << std::endl;
+    return 1;
+  }
+
+  // Print the event ids and times.
+  for (const SystemSessionEventFetcher::EventInfo& event : events) {
+    base::Time::Exploded exploded = {};
+    event.event_time.LocalExplode(&exploded);
+    std::string time = base::StringPrintf(
+        "%d/%d/%d %d:%02d:%02d", exploded.month, exploded.day_of_month,
+        exploded.year, exploded.hour, exploded.minute, exploded.second);
+    std::cout << "Event: " << event.event_id << " (" << time << ")"
+              << std::endl;
+  }
+
+  return 0;
+}